Metro: The subway system in Prague, Czech Republic, which is now the backbone of the city's public transit.

Construction began in 1965 and continues to this day. The first segment was opened in 1974. Currently, the subway has three lines, A (color coded green), B (yellow), and C (red), with a total of 50 stations. They are arranged so that there's a triangle of 3 transfer stations (Muzeum - A/C, Mùstek - A/B, and Florenc - B/C) in the city centre. Two stations are currently under construction on Line C, and Line D (presumably blue) is in planning stages; construction may begin around 2010.

The subway was, of course, one of the major achievements of the Communist regime, and it was presented as such. Stations were given names such as Moskevská (Moscow St.) or Gottwaldova (named after Klement Gottwald, the first Communist president of Czechoslovakia). After the Velvet Revolution, 13 stations were renamed; however, cheerfully socialist etchings and mosaics can still be admired in a couple of stations.

There are three types of trains currently in service: An old type called (imaginatively) 81-71, manufactured in the '80s by the Soviet Union, these trains are gradually being replaced as they approach their deadline; 81-71M, a refit version of the former, produced by CKD; and M1, a brand new type, made since 1999 by a Czech/German consortium CKD/Siemens. The oldest type still accounts for all the traffic on Lines A and B, while the newer ones are deployed on Line C. There was also a batch of trains from the '70s called Ecs, also made in the Soviet Union, which served as the basis for the 81-71 design. All of these were decomissioned in the '80s and '90s.

In the 1970s and '80s, the subway was planned as a fallout shelter system in case of a nuclear war. However, during the great floods in August 2002, some of the seals and defences in tunnels and stations failed and more than half of all the stations were either flooded or cut off. Now in June 2003, everything is back to normal save for wall facings in two or three stations.

A chart of the subway lines in their normal state can be found at . The two new stations are being constructed beyond Nádraží Holešovice.